【作者】 江伟；

【导师】 俞本立； 徐峰；

【作者基本信息】 安徽大学 ， 光学， 2006， 硕士

【摘要】 在雷达、导航、舰艇等系统中常需要将信号或能量从一个旋转平台传输到另一静止平台。早期，旋转平台间的信号传输与控制采用电滑动环旋转传输电信号来实现。但是随着现代信息控制与处理对信号传输容量和带宽提出了更高的要求，电滑动环不能满足使用要求。因此，以光信号传输为基础，综合电光转换及数据处理的光纤旋转连接传输技术逐渐取代电滑动环的旋转连接技术。随着光通信技术的不断发展，新型光通信器件不断涌现，光纤旋转连接信号传输技术以其具有大传输容量、宽带宽、良好电磁兼容、体积小和重量轻等诸多优点，越来越受到研究重视。 在本文中，一种以光纤旋转连接技术为核心，结合光／电信号转换与处理技术的光纤旋转连接高速双向数据传输系统设计方案被提出和实现。系统包括光／电收发模块、线路编码解码模块和双向光纤旋转连接信道三部分。通过对系统的光／电收发模块、双向传输光纤信道及高速数据传输性能的测试与分析，结果表明系统具有2.5Gbps的单路传输速率，低旋转损耗变化和插损，体积小，良好电磁兼容特性。采用光环行器结构的双向传输技术具有光路结构简单，信道隔离高，插损小和可靠性高的优点。 通过对光纤旋转连接技术的分析，考虑其与WDM技术相结合的发展趋势，一种新型光纤旋转连接器的设计结构被提出和分析。该设计以光子晶体光纤为基础，采用直接耦合的方法实现低损耗的光纤旋转连接。耦合损耗理论分析结果表明，该设计方案能降低光纤旋转连接器的机械加工和装配精度，具有低插入损耗和简单的光路结构的优点，在目前国内现有条件下能实际生产。以光子晶体光纤作为光信号传输通道，能有效抑止WDM传输中产生的非线性效应，因而该光纤旋转连接器能更有效的与WDM技术相结合，大大提高信号传输容量。更多还原

【Abstract】 Signals and energy often need to be transmitted from stationary platform to rotary platform in many fields, e.g. radar system, navigation system and naval vessels, etc. In the past, signal between stationary platform and rotary platform transmitted by electronic slip ring in order to realize remote control. As transmission capacity and band width of signal are increasing, performance of electronic slip ring could not meet the requirement of applied system. A kind of fiber optic rotary transmission technology, which is based on optic fiber signal transmission, is proposed and replace electronic slip ring. Researchers more and more focus on this kind of technology because of its properties of optic signal transmission, e.g. high transmission capacity, broad band-width, electromagnetic compatibility, low insertion loss, etc.In this paper, a kind of fiber optic rotary connection system with high signal transmission rate is presented and realized, which is based on fiber optic rotary connection and composed of optic-electronic transceiver modular, line code modular and bi-directional channel of fiber optic rotary. The results of measurement and analysis indicates that system possess maximum transmission rate of 2.5Gbps, low variation of insertion loss and total insertion loss, excellent EMC, etc. The method of bi-directional transmission is designed by using optic calculator, isolation degree, insertion loss and reliability of system by this way are better than other methods.A new type of fiber optic rotary joint is also proposed in the paper. Low loss connection of fiber optic rotary is realized by direct coupling of fiber, which is photon crystal fiber （PCF）. The results of analysis of coupling theory indicates that the method of direct coupling of PCF decrease obviously accuracy of machining and assembly. The PCF joint posses low insertion loss of 0.5dB. It could be manufactured depend on the machining condition in domestic. The PCF joint could effectively suppress non-linear effect of S₁O₂ fiber. Therefore更多还原